Vantec NexStar MX Specifications download pdf (Page 19)

RAID 1

：

It allows the device automatically to copy data to both hard drives. It stores all data in duplicate on

separate drives to protect against data loss due to drive failure. It provides the highest level of data

protection for critical data that you cannot afford to lose if a hard drive fails. The capacity is equal to the

smaller of the two hard drives. If one drive fails, the SAFE volume is still usable, but it is in a vulnerable

state because its mirrored hard drive is inaccessible. When the offline drive comes back online, the

appliance begins a rebuild process immediately to restore data redundancy. Although the volume remains

available during the rebuild process, the volume is susceptible to data loss through damage to the

remaining drive until redundancy is restored at the end of the rebuild and verification process. Host access

takes precedence over the rebuild process. If you continue to use the SAFE volume during the rebuild, the

rebuild process will take a longer time to complete, and the host data transfer performance will also be

affected.

Drive A

250GB

Drive B

250GB

NST-400MX-SR

Port 0 Port 1

Drive A

250GB

NST-400MX-SR

Port 0 Port 1

Raid 1

250GB

Raid 1

250GB

Unequal hard drives

Equal hard drives

750GB

Drive A

RAID Mode Selection

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Vantec NexStar MX Specifications Page 19